Continental Modeller (the railway modelling magazine) has a fantastic feature this month - The Kennesaw Junction Railroad built to a scale of 1/55th and running on 16.5mm track. (representing 3 foot gauge).
I have copied this image from the Blog site - details of which can be found below;
http://metusajunction.blogspot.co.uk/2013/03/nice-movie-of-layout.htmlThere are loads of work-in-progress images to be found by searching through the Blog.
Enjoy.
Tony